In-plane performance of gypsum board partition wall systems subjected to cyclic loadings

The objective of this study was to develop a better understanding of the seismic behavior of nonstructural partition walls and to provide damping methods in order to improve such behavior. This paper summarizes the findings of the study, where nine full scale wall specimens were divided into three groups of different damping systems and tested under cyclic loading conditions. The wall specimens were made of light gauge steel studs and sheathed on both sides with gypsum board (GB). Three specimens were constructed with single rubber grommet dampers, three specimens with double dampers and three wall specimens were constructed without damping system in order to have a basis for comparison. Test results included cyclic hysteresis and envelop curves of load-displacement relationships, damages and failure modes as described by photographs taken during and after testing, and ductility factor for each damping system. Based on the cyclic envelope curves, peak load capacities and their corresponding drifts were determined. Further, comparison of the peak points envelopes for none, single, and double damping specimens provided vital understanding of the relative drift capacities of the walls in addition to the ductility factor which is a measure of ductility. Damages and failure modes were noted through visual inspection and photographs. The study concluded with recommendations for further studies.